Boolean type

Boolean is a variable type with two posible values: true, and false. The default value of a boolean is flase.
Make a new boolean:

• boolean x = false;

Modify a boolean:

• x = !x; set x to false if x is true before the statement is called

example:

• if( true) is equivalent to if( ture == ture) always true ;
• if( !true) is equivalent to if( false == true) //always false;